The hollow stem of a grass or cereal plant, especially that bearing the flower.
- The main culms of the plants were harvested at anthesis, 18 days post-anthesis and at maturity.
- At the lower end of this maximum, the portion of this tissue decreases, but closer to the ground, the stems, and often also the culms of the grasses, increase (as can easily be seen in trees), and produce a second maximum.
- We also realized that the culms of plants tend to elongate as the growing season progresses.
Mid 17th century: from Latin culmus 'stalk'.
1 Geology A series of Carboniferous strata in SW England, mainly shale and limestone with some thin coal seams.
- The Lower Carboniferous and lowermost Upper Carboniferous stratigraphic sequence is composed of the Culm siliceous shales, the Culm siliceous limestones, the Culm limestones and the upper black shales.
- Sedimentation characterized by radiolarian-bearing red mudrocks is typical of the interval between the sulphide layer and the flysch of the Culm.
- Ahead of this deformation front there is a record of synorogenic sedimentation that is referred to as the Culm.
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